STM32L021D4 datasheet(56/114 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L021x4

56/114

DocID027982 Rev 5

Table 25. Current consumption in Sleep mode

Symbol

Parameter

Conditions

fHCLK

Typ

Max(1)

Unit

IDD (Sleep)

Supply current

in Sleep

mode, Flash

OFF

fHSE = fHCLK up to

16 MHz included,

fHSE = fHCLK/2

above 16 MHz

(PLL ON)(2)

Range 3,

VCORE=1.2 V,

VOS[1:0]=11

1 MHz

36.5

µA

2 MHz

4 MHz

100

150

Range 2,

VCORE=1.5 V,

VOS[1:0]=10

4 MHz

125

170

8 MHz

230

300

16 MHz

450

540

Range 1,

VCORE=1.8 V,

VOS[1:0]=01

8 MHz

275

350

16 MHz

555

650

32 MHz

1350

1600

MSI clock

Range 3,

VCORE=1.2 V,

VOS[1:0]=11

65 kHz

15.5

524 kHz

26.5

4.2 MHz

115

160

HSI16 clock source

(16 MHz)

Range 2,

VCORE=1.5 V,

VOS[1:0]=10

16 MHz

585

670

Range 1,

VCORE=1.8 V,

VOS[1:0]=01

32 MHz

1500

1700

Supply current

in Sleep

mode, Flash

fHSE = fHCLK up to

16 MHz included,

fHSE = fHCLK/2

above 16 MHz (PLL

ON)(2)

Range 3,

VCORE=1.2 V,

VOS[1:0]=11

1 MHz

2 MHz

120

4 MHz

115

190

Range 2,

CORE=1.5 V,

VOS[1:0]=10

4 MHz

135

200

8 MHz

240

340

16 MHz

460

650

Range 1,

VCORE=1.8 V,

VOS[1:0]=01

8 MHz

290

400

16 MHz

565

750

32 MHz

1350

1900

MSI clock

Range 3,

VCORE=1.2 V,

VOS[1:0]=11

65 kHz

26.5

524 kHz

38.5

4.2 MHz

125

190

HSI16 clock source

(16 MHz)

Range 2,

VCORE=1.5 V,

VOS[1:0]=10

16 MHz

600

760

Range 1,

VCORE=1.8 V,

VOS[1:0]=01

32 MHz

1500

1850

1. Guaranteed by characterization results at 125 °C, not tested in production, unless otherwise specified.

2. Oscillator bypassed (HSEBYP = 1 in RCC_CR register).

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